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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Animals which have many estrous periods per year (ex: cow - sow)






2. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






3. 30-38 hours after estrus cycle begins






4. 114 days






5. Contains and regulates the temp of the testes for sperm production






6. 4-6 days






7. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.






8. Way to know everything is alright with the breeding male






9. Why does estrus happen before ovulation?






10. 16-20 hours






11. Provide nourishment for the developing sperm






12. Failure to have one testis (gonad) to descend






13. (male) pushes the testes outward toward the legs for a cool-down off of the body






14. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






15. Sperm production






16. FEED






17. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






18. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






19. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






20. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






21. 1. brain function - 2. blood flow - 3. willing female






22. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






23. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






24. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






25. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






26. Luteolysis happens because of the ____________ hormone






27. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






28. Not under a timeline - cow can not be sold as steak






29. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






30. Important 'landmark' during palpation






31. Birthing process (termination of gestation)






32. (FSH) causes egg to mature in females






33. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






34. The more stressed out the male is - the less sperm he is going to produce






35. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






36. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






37. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






38. 283 days






39. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






40. Parturition is controlled by...






41. Check feet and legs - look for masculine traits in build such as crest and muscling






42. 30-38 hours after estrus cycle begins






43. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






44. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






45. What makes the milk flow through the mammary glands?






46. (LH) stimulates the Leydig cells to produce testosterone






47. 1. brain function - 2. blood flow - 3. willing female






48. Can survive ~7 days in cow. vast majority <48 hours






49. Larger the cow - more milk is produced; smaller the cow - less milk is produced






50. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)